Force developing apparatus



Aug. 18, 1970 A, HyPRuETT 3,524,622

' FORCE DEVELOPING APPARATUS Filed June as, 1968 r INVENTOR. ARCHIE HARRYPRUETT United States Patent O 3,524,622 FORCE DEVELOPING APPARATUS Archie Harry Pruett, San Jose, Calif. (P.O. Box 3534, Coas Bay, Oreg. 97420) Filed June 26, 1968, Ser. No. 740,285 Int. Cl. 1366f 3/24 U.S. Cl. 254--1 4 Claims ABSTRACT OF THE DISCLOSURE Apparatus adapted to be actuated by an expansion ram, hydraulically operated, to simultaneously develop pushing, pulling and spreading forces available for use as required.

SUMMARY OF THE INVENTION My apparatus comprises an elongated rod having at one end a block and an oppositely disposed transversely extending stub and at the other end a hook.

A hollow sleeve slidable along the rod has a transversely extending stub at one end aligned with and adjacent the rod stub and at the other end has a hook aligned with and adjacent the rod hook. The sleeve further has at this other end a block aligned with the rod block.

When a hydraulically operated expansion ram is disposed between the blocks and is expanded, the blocks are pushed apart and the sleeve is moved rapidly towards the other end of the rod.

As a result, the hooks are pushed together, thus developing a pushing force therebetween, while the stubs are pulled apart, thus developing pulling and spreading forces therebetween.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a side View of my invention;

FIG. 2 is a view through 2-2 in FIG. 1;

FIG. 3 is a view through 3--3 in FIG. 1;

FIG. 4 is a view through 4-4 in FIG. 1; and

FIGS. 5, 6, 7 and 8 are side views of auxiliary parts used in my invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to FIGS. 1-4, an elongated rod 10 has a hook 12 secured to one end and a block 14 with an internal recess or bore 16 parallel to the axis of the rod at the other end 22. A stub 18 having two parallel plates and extending transversely outward from the rod is secured to end 22 and is oppositely disposed from block 14.

A hollow sleeve 24 is slidably disposed along the rod. Sleeve 24 has at one end 26 a hook 28 aligned with and adjacent hook 12 and also a block 30 aligned with block 14. Block 30 has an internal bore or recess 32 parallel to the axis of the rod, the open ends of recesses 16 and 32 facing each other. Sleeve 24 has at its other end 34 a transverse stub 36 aligned with and adjacent stub 18 as well as an oppositely disposed hollow tube 38 open at ice both ends and having an axis parallel to that of the sleeve.

When an hydraulic expansion ram 40 is placed with opposite ends adjacent corresponding blocks and a por tion of the ram intermediate its ends is passed through tube 38, operation of the ram pushes the blocks apart and develops the pulling, pushing and spreading forces simultaneously as previously described.

Referring now to FIGS. 14, the spacing between the blocks can be altered to change the length of the ram stroke and thus vary the strength of the forces by inserting shaft 50 of cylinder '52 in recess 32 and shaft 54 of cylinder 56 in recess 16. If necessary, further changes can be made by inserting shaft 58 of threaded cylinder 60 into axial recess 62 in cylinder 52 and by inserting cylinder 64 into recess 66 in cylinder 56.

While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.

Having thus described this invention, what is asserted as new is:

1. Apparatus adapted to apply pushing, pulling and spreading forces, said apparatus comprising:

an elongated rod having a block and a transversely extending stub at one end and a hook at the other end; and

a sleeve slidable along said rod, said sleeve having a transversely extending stub at one end aligned with the rod stub and a hook at the other end aligned with the hook on the rod, said sleeve further having a block at said other end whereby when a hydraulically operated expansion ram is disposed between the two blocks and expanded, said blocks are pushed apart, said sleeve is slid toward the other end of the rod, said hooks are pushed toward each other to provide therebetween a pushing force and said stubs are forced apart to provide therebetween pulling and spreading forces.

2. Apparatus as set forth in claim 1 further including a hollow short tube open at both ends and having its axis parallel to that of the sleeve, said tube being disposed between the blocks and secured to said one sleeve end.

3. Apparatus as set forth in claim 2 wherein each block has an axial bore.

4. Apparatus as set forth in claim 3 further including said ram, opposite ends of said ram cooperating with the inner ends of corresponding blocks, a portion of said ram intermediate its ends extending through said tube.

References Cited UNITED STATES PATENTS 2,947,275 8/ 1960 Edmonds 25493 X 3,031,743 5/1962 Duerksen 25493 X 3,411,747 11/1968 Lister 254-1 OTHELL M. SIMPSON, Primary Examiner D. R. MELTON, Assistant Examiner U.S. Cl. X.R. 248354 

